US20120160026A1 - Rotation detecting apparatus - Google Patents
Rotation detecting apparatus Download PDFInfo
- Publication number
- US20120160026A1 US20120160026A1 US13/393,689 US201013393689A US2012160026A1 US 20120160026 A1 US20120160026 A1 US 20120160026A1 US 201013393689 A US201013393689 A US 201013393689A US 2012160026 A1 US2012160026 A1 US 2012160026A1
- Authority
- US
- United States
- Prior art keywords
- core member
- external lead
- receiving hole
- detecting apparatus
- lead cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/02—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means
- G01D5/06—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means acting through a wall or enclosure, e.g. by bellows, by magnetic coupling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/02—Housings
- G01P1/026—Housings for speed measuring devices, e.g. pulse generator
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
- F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
- F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
- F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
- F16C2326/02—Wheel hubs or castors
Definitions
- This invention relates to a revolution detecting apparatus to be mounted on a bearing section of a wheel of an motor vehicle or the like.
- a revolution detecting apparatus has been mounted on a bearing section of a wheel of an motor vehicle.
- the revolution detecting apparatus detects a wheel revolution speed to be utilized to control an antilock braking system(ABS).
- ABS antilock braking system
- a revolution detecting apparatus in the prior art has widely adopted a connector connection for carrying out a method for fixing an external lead cable onto a lead wire extending from a detecting section of a revolution detecting sensor.
- a revolution detecting sensor includes a detecting section, and a holding section made of hard synthetic resin and holding the detecting section.
- a connector coupling section is integrated with the holding section.
- an object of the present invention is to provide a revolution detecting apparatus having a new construction that can attain compatibility between enhancement in waterproofing function of a revolution detecting sensor and miniaturization of the whole apparatus.
- a first aspect of the present invention is directed to a revolution detecting apparatus wherein a core member rotatably supports an inner member to be attached to a wheel and is fixed on an outer member that constitutes a wheel bearing device, a revolution detecting sensor is attached to the core member, a detecting section of the revolution detecting sensor is opposed to a magnetic rotor provided on the inner member, and the detecting section detects a variation of a magnetic field caused by revolution of the magnetic rotor.
- the revolution detecting apparatus is characterize in that: the revolution detecting sensor is contained in an inner space covered by the core member and is supported by the core member; a lead wire extending from the detecting section of the revolution detecting sensor is electrically connected to an external lead cable; the external lead cable is drawn out from the inner space through a receiving hole in the core member; a sealing member is secured to an outer peripheral surface of the external lead cable; and the sealing member is fitted in the receiving hole in the core member.
- the sealing member provided on the outer periphery of the external lead cable can close the receiving hole in the core member when the external lead cable is drawn out from the inner space defined by the core member and the outer member, it is possible to overcome the problem about the clearance caused by the connector connection. Accordingly, it is possible to obtain the waterproofing function in the drawn portion of the external lead cable with high reliability.
- the external lead cable and the connecting portion between the lead wire and the external lead cable can be contained in the inner space and only the external lead cable can be drawn out from the core member and can be arranged. Accordingly, it is possible to downsize the whole apparatus in comparison with the conventional construction in which a connector coupling portion having a great size had to be protruded from the core member.
- a second aspect of the present invention is directed to the revolution detecting apparatus according to the first aspect, wherein a sealing rubber is disposed on a coupling portion between the receiving hole in the core member and the sealing member to seal the coupling portion.
- the sealing rubber such as an O-ring seals the coupling portion between the receiving hole in the core member and the sealing member, even if the revolution detecting apparatus is exposed to a fierce variation in temperature, the coupling portion can flexibly follow a strain caused on account of difference in thermal expansion coefficient between the receiving hole in the core member and the sealing member and it is possible to obtain a further waterproofing function.
- a third aspect of the present invention is directed to the revolution detecting apparatus according to the first or second aspect, wherein a latch projection that is greater than the receiving hole in the core member is integrated with the sealing member, and the latch projection is engaged with the core member from a side of the inner space.
- the latch projection is caught on the periphery around the receiving hole, it is possible to prevent the external lead cable from being drawn out from the core member. It is also possible to prevent a drawing force from being applied to the revolution detecting sensor and the coupling portion between the lead wire and the external lead cable.
- a fourth aspect of the present invention is directed to the revolution detecting apparatus according to any one of the first to third aspects, wherein the core member is formed into a cup-like configuration, an opening space of the core member is secured to the outer member and is covered by the outer member so that the inner space is defined in the interior of the core member, an inner casing assembly is fixed on the core member, and the detecting section and the external lead cable are attached to the interior of the inner casing assembly.
- the inner casing assembly is further provided in the inner space in the core member, a double casing structure is constructed and the detecting section and the external lead cable are disposed in the interior of the inner casing assembly, thereby protecting them more highly.
- a fifth aspect of the present invention is directed to the revolution detecting apparatus according to the fourth aspect, wherein a presser hardware is fitted in the core member from the outside of the inner casing assembly so that the presser hardware is pressed into the core member, and the inner casing assembly is secured to the core member by the presser hardware.
- the presser hardware is secured to the core member, it is possible to easily prevent the revolution detecting sensor from being drawn out toward the wheel side.
- FIG. 1 is a longitudinal section view of an embodiment of a revolution detecting apparatus in accordance with the present invention, illustrating the revolution detecting apparatus attached to an axial end of a wheel bearing device.
- FIG. 2 is an end side view of the revolution detecting apparatus shown in FIG. 1 .
- FIG. 3 is an exploded perspective view of the revolution detecting apparatus shown in FIG. 1 .
- FIG. 4 is an enlarged view of a main part of the revolution detecting apparatus shown in FIG. 1 .
- FIG. 5 is a perspective view of a bottom member that constitutes the revolution detecting apparatus shown in FIG. 1 .
- FIG. 6 is a plan view of the bottom member shown in FIG. 5 .
- FIG. 7 is a side elevation view of the bottom member shown in FIG. 5 .
- FIG. 8 is a perspective view of a lid member that constitutes the revolution detecting apparatus shown in FIG. 1 .
- FIG. 9 is a plan view of the lid member shown in FIG. 8 .
- FIG. 10 is a side elevation view of the lid member shown in FIG. 8 .
- FIG. 11 is a plan view of a sealing member that constitutes the revolution detecting apparatus shown in FIG. 1 .
- FIG. 12 is a side elevation view of the sealing member shown in FIG. 11 .
- FIGS. 1 to 3 show a wheel speed sensor 10 that is an embodiment of the revolution detecting apparatus in accordance with the present invention.
- the wheel speed sensor 10 is mounted on an axial end of a wheel bearing device 14 attached to a hub shaft 12 .
- the one of axial end sides(a right end side in FIG. 1 ) of the wheel bearing device 14 is defined as a vehicle inside while the other of axial end sides(a left side in FIG. 1 ) of the device 14 is defined as a vehicle outside.
- the hub shaft 12 is provided on its axial middle part of an axis section 16 with a flange portion 18 that extends outward in a radial direction(a direction perpendicular to an axis).
- a wheel(not shown) is secured to a vehicle outside end of the axis section 16 on the flange portion 18 .
- the axis section 16 is provided at the vehicle inside over the flange portion 18 with an annular stepped surface 20 that extends in the radial direction(in the direction perpendicular to the axis).
- the axis section 16 is provided at the vehicle inside over the annular stepped surface 20 with a smaller diameter portion 22 that is smaller than a diameter of the vehicle outside.
- the wheel bearing device 14 attached to the hub shaft 12 includes an inner member 24 , an outer member 26 , and rolling elements 28 arranged on a plurality of rows.
- the inner member 24 is formed into an annular block-like configuration that has a great thickness and a small diameter as a whole.
- the inner member 24 is fitted on and secured to a smaller diameter portion 22 of the hub shaft 12 .
- the outer member 26 is formed into a cylindrical configuration that has a great thickness and a great diameter as a whole.
- the outer member 26 is mounted on the axis section 16 of the hub shaft 12 to which the inner member 24 is secured.
- the outer member 26 is disposed outside the axis section 16 and the inner member 24 in the radial direction(in the direction perpendicular to the axis).
- the outer member 26 is inserted into a receiving hole 34 in a support member 32 made of an element such as a knuckle on a vehicle body side.
- the outer member 26 is fixed on the support member 32 by bolts at an attaching flange 36 that extends outward in the radial direction.
- the outer member 26 is secured to the support member 32 at the vehicle body side so that the outer member 26 cannot rotate.
- the rolling elements 28 on the plural rows are rotatably disposed between outer ring tracks 38 , 38 formed in an inner peripheral surface of the outer member 26 and inner ring tracks 40 , 40 formed in outer peripheral surfaces on the axis section 16 of the hub shaft 12 and on the inner member 24 .
- the inner member(wheel) 24 is rotatably supported on the outer member 26 (the support member 32 at the vehicle body side 32 ).
- the inner ring track 40 disposed at the vehicle inside is defined across the axis section 16 of the hub shaft 12 and the inner member 24 .
- An opening space toward the vehicle inside is defined in a clearance between surfaces of the outer member 26 and the inner member 24 opposed to each other in the radial direction.
- a support hardware 42 is disposed in the opening space so that the support hardware 42 is fitted on the inner member 24 at an vehicle inner side end.
- the support hardware 42 is provided with an outer flange 56 that extends outward from the vehicle inner side end of a cylindrical portion 54 in the radial direction through a whole periphery of the portion 54 .
- a magnetic rotor 58 is secured to the outer flange 56 at the vehicle inside.
- the magnetic rotor 58 is made of a rubber magnet, a plastic magnet, or the like in which N poles and S poles are formed alternately in a peripheral direction of the rotor 58 .
- the magnetic rotor 58 is formed into an annular plate-like configuration as a whole.
- a wheel speed sensor 10 is attached to the vehicle inside end of the wheel bearing device 14 and includes a core member 66 .
- the core member 66 includes a cylindrical wall 68 and a bottom wall 70 that covers an opening space defined in an axial end of the cylindrical wall 68 .
- the core member 66 is formed into a cup-like configuration as a whole.
- the core member 66 is provided in a center part of the bottom wall 70 with a receiving hole 72 that is open in a circular shape in cross section.
- the core member 66 is provided on a peripheral edge around the receiving hole 72 with a cylindrical portion 74 that extends outward in the axial direction.
- the receiving hole 72 extends straight in the axial direction in the cylindrical portion 74 so that the receiving hole 72 maintains a substantially circular shape in cross section.
- the opening space in the core member 66 is fixed on the vehicle inside end of the outer member 26 .
- a contact flange 76 that extends outward from an opening space edge around the core member 66 in the radial direction(in the direction perpendicular to the axis) is superposed on an annular contact surface 78 that extends in the radial direction on an outer peripheral surface of the vehicle inside end of the outer member 26 .
- an inner space 80 is defined in the interior of the core member 66 .
- the inner casing assembly 82 is disposed in the inner space 80 .
- the inner casing assembly 82 includes a bottom casing member 84 and a lid member 86 .
- the bottom member 84 is formed into a shallow dish-like configuration in which a peripheral wall 90 projects from an outer peripheral edge of a disk-like bottom wall 88 through its whole periphery. Reinforcement ribs 92 project from the bottom wall 88 in a grid manner.
- the bottom wall 88 is provided in its central part with a central hole 94 .
- the central hole 94 has an opening in cross section greater than the receiving hole 72 in the core member 66 .
- the central hole 94 is provided in the one of its square sides(a left lower side in a plan view in FIG. 6 ) with a cut-out remainder 95 .
- the bottom wall 88 is provided on its outer periphery with a curved projection 96 that extends by a suitable length in a peripheral direction and projects in the same direction as the peripheral wall 90 .
- the curved projection 96 includes a pair of curved walls 98 a and 98 b that are spaced apart from each other by a suitable distance in the radial direction are opposed to each other in the radial direction.
- the curved walls 98 a and 98 b are coupled to each other by a plurality of connecting walls 100 that are spaced apart from one another by a suitable distance in the peripheral direction.
- a projecting height of the curved projection 96 is greater than projecting heights of the peripheral wall 90 and reinforcement ribs 92 .
- the curved walls 98 a and 98 b are integrated with the peripheral wall 90 .
- the outer curved wall 98 a is provided on its projecting end with a stepped surface 102 that is curved at a radial intermediate part in a peripheral direction and extends in a height direction.
- a height of a radial inside is set to be smaller than that of a radial outside with respect to the stepped surface 102 .
- the outer curved wall 98 a is provided on its projecting end with a support surface 106 that is disposed on the same height as projecting end surfaces of the coupling walls 100 at the inside in the radial direction from the stepped surface 102 .
- the lid member 86 is formed into a shallow dish-like configuration in which a peripheral wall 110 projects from an outer peripheral edge of a disk-like bottom wall 108 through its whole periphery. Reinforcement ribs 112 project from the bottom wall 108 in a grid manner.
- the bottom wall 108 is provided on its outer peripheral part with a deep bottom portion 114 that is a flat surface-like configuration corresponding to the curved projection 96 .
- the peripheral wall 110 is not provided on the peripheral part of the deep bottom portion 114 .
- the lid member 86 and the bottom member 84 can be superposed on and coupled to each other in the axial direction.
- the inner hollow casing assembly 82 can be formed(see FIG. 1 ).
- the inner casing assembly 82 is provided on its outer peripheral part with a holding projection 120 so that the deep bottom portion 114 is superposed on the projecting portion of the curved projection 96 .
- a revolution detecting sensor 122 is attached to the interior in a projecting end portion of the holding projection 120 .
- the revolution detecting sensor 122 includes a detecting section 124 and lead wires 126 , 126 .
- the detecting section 124 is made of a hole IC(Integrated Circuit).
- the detecting section 124 outputs a hole voltage in response to a change of a magnetic flux density caused by revolution of the magnetic rotor 58 .
- the detecting section 124 is disposed on a board 128 that has a flat surface-like configuration smaller than the deep bottom portion 114 .
- the board 128 is contained in a clearance defined among the projecting end surfaces of the coupling walls 100 , the support surface 106 on the outer curved wall 98 a, and the deep bottom portion 114 .
- the revolution detecting sensor 122 is attached to the interior in the projecting end portion of the holding projection 120 .
- the detecting section 124 is disposed between two protrusions 129 a and 129 b that project from the deep bottom portion 114 .
- the lead wires 126 , 126 extend from the detecting section 124 .
- the lead wires 126 , 126 are soldered to input and output electrical wires 132 , 132 of an external lead cable 130 through a conductive pattern(not shown) formed on the board 122 .
- the lead wires 126 , 126 and the external lead cable 130 are electrically connected to each other.
- the input and output electrical wires 132 , 132 of the external lead cable 130 are made of copper wires covered with sheath materials made of synthetic resin such as polyethylene.
- the wires 132 , 132 are bundled with each other and are contained in synthetic resin cover members.
- the external lead cable 130 are led out from the central hole 94 in the bottom member 84 .
- the input and output electrical wires 132 , 132 pass a guide passage 140 that is defined by a pair of guide walls 134 , 134 that project from a central part on the bottom wall 108 of the lid member 86 and extend in parallel with each other, and cut-out portions 136 , 138 formed in the reinforcement ribs 92 of the bottom member 84 and in the reinforcement ribs 112 of the lid member 86 .
- the input and output electrical wires 132 , 132 extend from the central part of the inner casing assembly 82 to an outer periphery provided with the holding projection 120 .
- the input and output electrical wires 132 , 132 enter the holding projection 120 through a cut-out portion 142 formed in the inner curved wall 98 b and are soldered to the conductive pattern formed on the board 128 .
- the revolution detecting sensor 122 and the external lead cable 130 are attached to the interior in the inner casing assembly 82 and the inner casing assembly 82 is contained in the inner space 80 when the bottom wall 108 of the bottom member 84 is superposed onto the bottom wall 70 of the core member 66 .
- the holding projection 120 extends along the cylindrical wall 68 of the core member 66 in the peripheral direction and projects toward the opening end side of the core member 66 .
- a presser hardware 144 is disposed in the inner space 80 , in which the inner casing assembly 82 is contained, at the opening side of the core member 66 beyond the inner casing assembly 82 .
- the presser hardware 144 is formed into a thin disk-like configuration as a whole and is provided in a central part with a rectangular aperture 146 in cross section.
- the presser hardware 144 is provided with a pair of fixing pieces 148 , 148 (see FIGS. 3 and 4 ) extending outward in the radial direction so that the fixing pieces 148 , 148 are opposed to each other across the center of the presser hardware 144 .
- Each fixing piece 148 is provided in its central part in the peripheral direction with a cut-out portion 150 .
- the fixing piece 148 can be readily deformed in its thickness direction and the presser hardware 144 can be easily fitted into the cylindrical wall 68 of the core member 66 .
- a distance between the pair of fixing pieces 148 , 148 at the one side in the peripheral direction is the same as a distance between the fixing pieces 148 , 148 at the other side in the peripheral direction.
- the inner casing assembly 82 is pressed between the presser hardware 144 and the bottom wall 70 of the core member 66 and is secured to the core member 66 , when the holding projection 120 protrudes toward the opening side of the core member 66 beyond the presser hardware 144 .
- the holding projection 120 which protrudes toward the opening side of the core member 66 beyond the presser hardware 144 , is faced to the magnetic rotor 58 through a given distance.
- the detecting section 124 attached to the projecting end of the holding projection 120 is opposed to the magnetic rotor 58 across the deep bottom portion 114 .
- the external lead cable 130 extends outward from the receiving hole 72 in the core member 66 .
- a sealing member 152 is secured to an outer peripheral surface of the external lead cable 130 .
- the sealing member 152 is fitted in the receiving hole 72 in the core member 66 .
- the sealing member 152 is made of polyimide such as PA612.
- the sealing member 152 is closely adhered to the outer peripheral surface of the external lead cable 130 in good condition. As shown in FIGS. 11 and 12 , the sealing member 152 is formed into a thick disk-like configuration as a whole.
- the sealing member 152 is provided on its intermediate part in the axial direction with a stepped surface 154 that extends in the radial direction(in the direction perpendicular to the axis).
- the one axial side of the sealing member 152 across the stepped surface 154 defines a smaller diameter portion 156 while the other axial side of the sealing member 152 across the stepped surface 154 defines a larger diameter portion 158 .
- a size in outer diameter of the larger diameter portion 158 is substantially the same as a size in an inner diameter of the receiving hole 72 in the core member 66 .
- the larger diameter portion 158 is provided on its intermediate part in the axial direction with a groove 160 that is open in an outer peripheral surface of the portion 158 , has a substantially constant shape in cross section, and extends through the whole periphery of the portion 158 .
- a latch projection 162 is integrated with the other axial end of the larger diameter portion 158 .
- the latch projection 162 is formed into a rectangular block-like configuration as a whole.
- a positioning surface 163 (see FIG. 11 ) is formed on the outer peripheral surface of the latch projection 162 by cutting out a corner of a square portion in a plan view.
- the latch projection 162 has a size and a cross sectional shape corresponding to the central hole 94 in the bottom member 84 and extends in the axial direction.
- the sealing member 152 is secured to a part of the external lead cable 130 that extends outward from the inner casing assembly 82 .
- the sealing member 152 can be molded on the external lead cable 130 or can be secured to the external wire 130 by an adhesive after forming the sealing member 152 in another process.
- the sealing member 152 secured to the external lead cable 130 is fitted into the receiving hole 72 in the core member 66 , when the larger diameter portion 158 of the sealing member 152 is inserted into the cylindrical portion 74 of the core member 66 from the inside of the core member 66 .
- a sealing rubber 164 made of an O-ring or the like is disposed in the groove 160 in the sealing member 152 .
- An outer peripheral edge around the latch projection 162 of the sealing member 152 is superposed on the opening peripheral edge around the receiving hole 72 in the bottom wall 70 of the care element 66 .
- the latch projection 162 of the sealing member 152 is engaged with the bottom wall 70 of the core member 66 from the inside of the core member 66 .
- the sealing member 152 When the sealing member 152 is fitted in the receiving hole 72 in the core member 66 , the latch projection 162 of the sealing member 152 is fitted in the central hole 94 . Thus, the external lead cable 130 is prevented from rotating about the central axis of the cable 130 .
- the larger diameter portion 158 of the sealing member 152 attached closely to the external lead cable 130 is fitted in the cylindrical portion 74 of the core member 66 and the external lead cable 130 is led outward from the core member 66 through the larger diameter portion 152 .
- the sealing rubber 164 disposed in the groove 160 in the larger diameter portion 158 seals the clearance between the lager diameter portion 158 and the cylindrical portion 74 .
- revolution detecting sensor 122 and the external lead cable 130 are contained in the inner casing assembly 82 .
- the latch projection 162 is engaged with the opening peripheral edge around the receiving hole 72 from the inside of the core member 66 .
- the inner casing assembly 82 is clamped by the presser hardware 144 , which is pressed into and secured to the cylindrical portion 68 of the core member 66 , and by the bottom wall 70 of the core member 66 .
- the presser hardware 144 which is pressed into and secured to the cylindrical portion 68 of the core member 66 , and by the bottom wall 70 of the core member 66 .
- the revolution detecting sensor may be a construction in which a publicly known hole IC is molded in resin and the revolution detecting sensor is directly secured to the core member to eliminate the inner casing assembly.
Abstract
Description
- This invention relates to a revolution detecting apparatus to be mounted on a bearing section of a wheel of an motor vehicle or the like.
- Heretofore, a revolution detecting apparatus has been mounted on a bearing section of a wheel of an motor vehicle. The revolution detecting apparatus detects a wheel revolution speed to be utilized to control an antilock braking system(ABS).
- A revolution detecting apparatus in the prior art has widely adopted a connector connection for carrying out a method for fixing an external lead cable onto a lead wire extending from a detecting section of a revolution detecting sensor. For example, as shown in FIG. 2 in Patent Document 1(JP 4179083B), a revolution detecting sensor includes a detecting section, and a holding section made of hard synthetic resin and holding the detecting section. A connector coupling section is integrated with the holding section. When a connector attached to an end of an external lead cable is attached to the connector coupling section, a lead wire projecting into the connector coupling section is connected to the external lead cable.
- However, if such connector connection is adopted, since there is a clearance between the connector coupling section and the connector attached thereto, it was not possible to prevent water from entering the connector coupling section through the clearance.
- Since the conventional revolution detecting apparatus has adopted the connector connection, the connector coupling section has required a great size. Consequently, it was not possible to avoid to upsize the revolution detecting apparatus. There was a problem that the need for space saving in a modern motor vehicle cannot be filled.
- PATENT DOCUMENT 1: JP 4179083B
- In view of the above problems, an object of the present invention is to provide a revolution detecting apparatus having a new construction that can attain compatibility between enhancement in waterproofing function of a revolution detecting sensor and miniaturization of the whole apparatus.
- A first aspect of the present invention is directed to a revolution detecting apparatus wherein a core member rotatably supports an inner member to be attached to a wheel and is fixed on an outer member that constitutes a wheel bearing device, a revolution detecting sensor is attached to the core member, a detecting section of the revolution detecting sensor is opposed to a magnetic rotor provided on the inner member, and the detecting section detects a variation of a magnetic field caused by revolution of the magnetic rotor. The revolution detecting apparatus is characterize in that: the revolution detecting sensor is contained in an inner space covered by the core member and is supported by the core member; a lead wire extending from the detecting section of the revolution detecting sensor is electrically connected to an external lead cable; the external lead cable is drawn out from the inner space through a receiving hole in the core member; a sealing member is secured to an outer peripheral surface of the external lead cable; and the sealing member is fitted in the receiving hole in the core member.
- According to the first aspect of the present invention, since the sealing member provided on the outer periphery of the external lead cable can close the receiving hole in the core member when the external lead cable is drawn out from the inner space defined by the core member and the outer member, it is possible to overcome the problem about the clearance caused by the connector connection. Accordingly, it is possible to obtain the waterproofing function in the drawn portion of the external lead cable with high reliability.
- By artfully utilizing the inner space defined by the core member and the outer member, the external lead cable and the connecting portion between the lead wire and the external lead cable can be contained in the inner space and only the external lead cable can be drawn out from the core member and can be arranged. Accordingly, it is possible to downsize the whole apparatus in comparison with the conventional construction in which a connector coupling portion having a great size had to be protruded from the core member.
- A second aspect of the present invention is directed to the revolution detecting apparatus according to the first aspect, wherein a sealing rubber is disposed on a coupling portion between the receiving hole in the core member and the sealing member to seal the coupling portion.
- According to the second aspect of the present invention, since the sealing rubber such as an O-ring seals the coupling portion between the receiving hole in the core member and the sealing member, even if the revolution detecting apparatus is exposed to a fierce variation in temperature, the coupling portion can flexibly follow a strain caused on account of difference in thermal expansion coefficient between the receiving hole in the core member and the sealing member and it is possible to obtain a further waterproofing function.
- A third aspect of the present invention is directed to the revolution detecting apparatus according to the first or second aspect, wherein a latch projection that is greater than the receiving hole in the core member is integrated with the sealing member, and the latch projection is engaged with the core member from a side of the inner space.
- According to the third aspect of the present invention, even if an external force is applied to the external lead cable so as to draw it out, since the latch projection is caught on the periphery around the receiving hole, it is possible to prevent the external lead cable from being drawn out from the core member. It is also possible to prevent a drawing force from being applied to the revolution detecting sensor and the coupling portion between the lead wire and the external lead cable.
- A fourth aspect of the present invention is directed to the revolution detecting apparatus according to any one of the first to third aspects, wherein the core member is formed into a cup-like configuration, an opening space of the core member is secured to the outer member and is covered by the outer member so that the inner space is defined in the interior of the core member, an inner casing assembly is fixed on the core member, and the detecting section and the external lead cable are attached to the interior of the inner casing assembly.
- According to the fourth aspect of the present invention, since the inner casing assembly is further provided in the inner space in the core member, a double casing structure is constructed and the detecting section and the external lead cable are disposed in the interior of the inner casing assembly, thereby protecting them more highly.
- A fifth aspect of the present invention is directed to the revolution detecting apparatus according to the fourth aspect, wherein a presser hardware is fitted in the core member from the outside of the inner casing assembly so that the presser hardware is pressed into the core member, and the inner casing assembly is secured to the core member by the presser hardware.
- According to the fifth aspect of the present invention, since the presser hardware is secured to the core member, it is possible to easily prevent the revolution detecting sensor from being drawn out toward the wheel side.
- According to the present invention, it is possible to attain compatibility between enhancement in waterproofing function of a revolution detecting sensor and miniaturization of the whole apparatus.
- [
FIG. 1 ]FIG. 1 is a longitudinal section view of an embodiment of a revolution detecting apparatus in accordance with the present invention, illustrating the revolution detecting apparatus attached to an axial end of a wheel bearing device. - [
FIG. 2 ]FIG. 2 is an end side view of the revolution detecting apparatus shown inFIG. 1 . - [
FIG. 3 ]FIG. 3 is an exploded perspective view of the revolution detecting apparatus shown inFIG. 1 . - [
FIG. 4 ]FIG. 4 is an enlarged view of a main part of the revolution detecting apparatus shown inFIG. 1 . - [
FIG. 5 ]FIG. 5 is a perspective view of a bottom member that constitutes the revolution detecting apparatus shown inFIG. 1 . - [
FIG. 6 ]FIG. 6 is a plan view of the bottom member shown inFIG. 5 . - [
FIG. 7 ]FIG. 7 is a side elevation view of the bottom member shown inFIG. 5 . - [
FIG. 8 ]FIG. 8 is a perspective view of a lid member that constitutes the revolution detecting apparatus shown inFIG. 1 . - [
FIG. 9 ]FIG. 9 is a plan view of the lid member shown inFIG. 8 . - [
FIG. 10 ]FIG. 10 is a side elevation view of the lid member shown inFIG. 8 . - [
FIG. 11 ]FIG. 11 is a plan view of a sealing member that constitutes the revolution detecting apparatus shown inFIG. 1 . - [
FIG. 12 ]FIG. 12 is a side elevation view of the sealing member shown inFIG. 11 . - Referring now to the drawings, an embodiment of a revolution detecting apparatus in accordance with the present invention will be described below.
-
FIGS. 1 to 3 show awheel speed sensor 10 that is an embodiment of the revolution detecting apparatus in accordance with the present invention. Thewheel speed sensor 10 is mounted on an axial end of a wheel bearingdevice 14 attached to ahub shaft 12. Hereinafter, the one of axial end sides(a right end side inFIG. 1 ) of the wheel bearingdevice 14 is defined as a vehicle inside while the other of axial end sides(a left side inFIG. 1 ) of thedevice 14 is defined as a vehicle outside. - More specifically, the
hub shaft 12 is provided on its axial middle part of anaxis section 16 with aflange portion 18 that extends outward in a radial direction(a direction perpendicular to an axis). A wheel(not shown) is secured to a vehicle outside end of theaxis section 16 on theflange portion 18. Theaxis section 16 is provided at the vehicle inside over theflange portion 18 with an annularstepped surface 20 that extends in the radial direction(in the direction perpendicular to the axis). Theaxis section 16 is provided at the vehicle inside over the annularstepped surface 20 with asmaller diameter portion 22 that is smaller than a diameter of the vehicle outside. - The wheel bearing
device 14 attached to thehub shaft 12 includes aninner member 24, anouter member 26, androlling elements 28 arranged on a plurality of rows. - The
inner member 24 is formed into an annular block-like configuration that has a great thickness and a small diameter as a whole. Theinner member 24 is fitted on and secured to asmaller diameter portion 22 of thehub shaft 12. - The
outer member 26 is formed into a cylindrical configuration that has a great thickness and a great diameter as a whole. Theouter member 26 is mounted on theaxis section 16 of thehub shaft 12 to which theinner member 24 is secured. Theouter member 26 is disposed outside theaxis section 16 and theinner member 24 in the radial direction(in the direction perpendicular to the axis). Theouter member 26 is inserted into a receivinghole 34 in asupport member 32 made of an element such as a knuckle on a vehicle body side. Theouter member 26 is fixed on thesupport member 32 by bolts at an attachingflange 36 that extends outward in the radial direction. Thus, theouter member 26 is secured to thesupport member 32 at the vehicle body side so that theouter member 26 cannot rotate. - The rolling
elements 28 on the plural rows are rotatably disposed between outer ring tracks 38, 38 formed in an inner peripheral surface of theouter member 26 and inner ring tracks 40, 40 formed in outer peripheral surfaces on theaxis section 16 of thehub shaft 12 and on theinner member 24. Thus, the inner member(wheel) 24 is rotatably supported on the outer member 26(thesupport member 32 at the vehicle body side 32). Theinner ring track 40 disposed at the vehicle inside is defined across theaxis section 16 of thehub shaft 12 and theinner member 24. - An opening space toward the vehicle inside is defined in a clearance between surfaces of the
outer member 26 and theinner member 24 opposed to each other in the radial direction. Asupport hardware 42 is disposed in the opening space so that thesupport hardware 42 is fitted on theinner member 24 at an vehicle inner side end. - The
support hardware 42, as shown also inFIG. 4 , is provided with anouter flange 56 that extends outward from the vehicle inner side end of acylindrical portion 54 in the radial direction through a whole periphery of theportion 54. Amagnetic rotor 58 is secured to theouter flange 56 at the vehicle inside. Themagnetic rotor 58 is made of a rubber magnet, a plastic magnet, or the like in which N poles and S poles are formed alternately in a peripheral direction of therotor 58. Themagnetic rotor 58 is formed into an annular plate-like configuration as a whole. - A
wheel speed sensor 10 is attached to the vehicle inside end of thewheel bearing device 14 and includes acore member 66. Thecore member 66 includes acylindrical wall 68 and abottom wall 70 that covers an opening space defined in an axial end of thecylindrical wall 68. Thecore member 66 is formed into a cup-like configuration as a whole. - The
core member 66 is provided in a center part of thebottom wall 70 with a receivinghole 72 that is open in a circular shape in cross section. Thecore member 66 is provided on a peripheral edge around the receivinghole 72 with acylindrical portion 74 that extends outward in the axial direction. Thus, the receivinghole 72 extends straight in the axial direction in thecylindrical portion 74 so that the receivinghole 72 maintains a substantially circular shape in cross section. - The opening space in the
core member 66 is fixed on the vehicle inside end of theouter member 26. At this time, acontact flange 76 that extends outward from an opening space edge around thecore member 66 in the radial direction(in the direction perpendicular to the axis) is superposed on anannular contact surface 78 that extends in the radial direction on an outer peripheral surface of the vehicle inside end of theouter member 26. Thus, an amount of coupling (coupling depth) between thecore member 66 and theouter member 26 is defined, thereby forming a given clearance between themagnetic rotor 58 and a holdingprojection 120 mentioned below. - As described above, since the opening space in the
core member 66 is fitted on and secured to the vehicle inside end of theouter member 26, the opening space in thecore member 66 is covered with thevehicle bearing device 14. Thus, aninner space 80 is defined in the interior of thecore member 66. - An
inner casing assembly 82 is disposed in theinner space 80. Theinner casing assembly 82 includes abottom casing member 84 and alid member 86. - As shown in
FIGS. 5 to 7 , thebottom member 84 is formed into a shallow dish-like configuration in which aperipheral wall 90 projects from an outer peripheral edge of a disk-like bottom wall 88 through its whole periphery.Reinforcement ribs 92 project from thebottom wall 88 in a grid manner. - The
bottom wall 88 is provided in its central part with acentral hole 94. Thecentral hole 94 has an opening in cross section greater than the receivinghole 72 in thecore member 66. As shown inFIG. 6 , thecentral hole 94 is provided in the one of its square sides(a left lower side in a plan view inFIG. 6 ) with a cut-out remainder 95. - The
bottom wall 88 is provided on its outer periphery with acurved projection 96 that extends by a suitable length in a peripheral direction and projects in the same direction as theperipheral wall 90. Thecurved projection 96 includes a pair ofcurved walls curved walls walls 100 that are spaced apart from one another by a suitable distance in the peripheral direction. A projecting height of thecurved projection 96 is greater than projecting heights of theperipheral wall 90 andreinforcement ribs 92. Thecurved walls peripheral wall 90. - The outer
curved wall 98 a is provided on its projecting end with a steppedsurface 102 that is curved at a radial intermediate part in a peripheral direction and extends in a height direction. A height of a radial inside is set to be smaller than that of a radial outside with respect to the steppedsurface 102. Thus, the outercurved wall 98 a is provided on its projecting end with asupport surface 106 that is disposed on the same height as projecting end surfaces of thecoupling walls 100 at the inside in the radial direction from the steppedsurface 102. - On the other hand, as shown in
FIGS. 8 to 10 , thelid member 86 is formed into a shallow dish-like configuration in which aperipheral wall 110 projects from an outer peripheral edge of a disk-like bottom wall 108 through its whole periphery.Reinforcement ribs 112 project from thebottom wall 108 in a grid manner. - The
bottom wall 108 is provided on its outer peripheral part with adeep bottom portion 114 that is a flat surface-like configuration corresponding to thecurved projection 96. Theperipheral wall 110 is not provided on the peripheral part of thedeep bottom portion 114. - When the
deep bottom portion 114 and thecurved projection 96 are opposed to each other, thelid member 86 and thebottom member 84 can be superposed on and coupled to each other in the axial direction. Thus, the innerhollow casing assembly 82 can be formed(seeFIG. 1 ). - When the
lid member 86 and thebottom member 84 are coupled to each other, anelastic latch piece 116 provided on an outer peripheral edge around thedeep bottom portion 114 is engaged with anengagement recess 118 provided on an outer peripheral surface of the outercurved wall 98 a in the axial direction. Thus, thelid member 86 and thebottom member 84 are maintained in an assembled state. - The
inner casing assembly 82 is provided on its outer peripheral part with a holdingprojection 120 so that thedeep bottom portion 114 is superposed on the projecting portion of thecurved projection 96. A revolution detecting sensor 122 is attached to the interior in a projecting end portion of the holdingprojection 120. The revolution detecting sensor 122 includes a detectingsection 124 andlead wires - The detecting
section 124 is made of a hole IC(Integrated Circuit). The detectingsection 124 outputs a hole voltage in response to a change of a magnetic flux density caused by revolution of themagnetic rotor 58. The detectingsection 124 is disposed on aboard 128 that has a flat surface-like configuration smaller than thedeep bottom portion 114. Theboard 128 is contained in a clearance defined among the projecting end surfaces of thecoupling walls 100, thesupport surface 106 on the outercurved wall 98 a, and thedeep bottom portion 114. Thus, the revolution detecting sensor 122 is attached to the interior in the projecting end portion of the holdingprojection 120. The detectingsection 124 is disposed between twoprotrusions deep bottom portion 114. - The
lead wires section 124. Thelead wires electrical wires external lead cable 130 through a conductive pattern(not shown) formed on the board 122. Thus, thelead wires external lead cable 130 are electrically connected to each other. - The input and output
electrical wires external lead cable 130 are made of copper wires covered with sheath materials made of synthetic resin such as polyethylene. Thewires external lead cable 130 are led out from thecentral hole 94 in thebottom member 84. - The input and output
electrical wires guide passage 140 that is defined by a pair ofguide walls bottom wall 108 of thelid member 86 and extend in parallel with each other, and cut-outportions reinforcement ribs 92 of thebottom member 84 and in thereinforcement ribs 112 of thelid member 86. The input and outputelectrical wires inner casing assembly 82 to an outer periphery provided with the holdingprojection 120. The input and outputelectrical wires projection 120 through a cut-outportion 142 formed in the innercurved wall 98 b and are soldered to the conductive pattern formed on theboard 128. - As described above, the revolution detecting sensor 122 and the
external lead cable 130 are attached to the interior in theinner casing assembly 82 and theinner casing assembly 82 is contained in theinner space 80 when thebottom wall 108 of thebottom member 84 is superposed onto thebottom wall 70 of thecore member 66. At this time, the holdingprojection 120 extends along thecylindrical wall 68 of thecore member 66 in the peripheral direction and projects toward the opening end side of thecore member 66. - A
presser hardware 144 is disposed in theinner space 80, in which theinner casing assembly 82 is contained, at the opening side of thecore member 66 beyond theinner casing assembly 82. Thepresser hardware 144 is formed into a thin disk-like configuration as a whole and is provided in a central part with arectangular aperture 146 in cross section. - The
presser hardware 144 is provided with a pair of fixingpieces 148, 148(seeFIGS. 3 and 4 ) extending outward in the radial direction so that the fixingpieces presser hardware 144. Each fixingpiece 148 is provided in its central part in the peripheral direction with a cut-outportion 150. Thus, as described after, the fixingpiece 148 can be readily deformed in its thickness direction and thepresser hardware 144 can be easily fitted into thecylindrical wall 68 of thecore member 66. - A distance between the pair of fixing
pieces pieces presser hardware 144 in the peripheral direction when thepresser hardware 144 is fitted into thecylindrical wall 68 of thecore member 66. - When the
inner casing assembly 82 is contained in thecore member 66 and the holdingprojection 120 is disposed between the pair of fixingpieces presser hardware 144 is fitted into thecylindrical wall 68 of thecore member 66. At this time, each of the pair of fixingpieces cylindrical wall 68 of thecore member 66 and thepresser hardware 144 is pressed into and fixed in thecore member 66 at the pair of fixingpieces inner casing assembly 82 is pressed between thepresser hardware 144 and thebottom wall 70 of thecore member 66 and is secured to thecore member 66, when the holdingprojection 120 protrudes toward the opening side of thecore member 66 beyond thepresser hardware 144. - The holding
projection 120, which protrudes toward the opening side of thecore member 66 beyond thepresser hardware 144, is faced to themagnetic rotor 58 through a given distance. Thus, the detectingsection 124 attached to the projecting end of the holdingprojection 120 is opposed to themagnetic rotor 58 across thedeep bottom portion 114. - When the
inner casing assembly 82 is fixed on thecore member 66, theexternal lead cable 130 extends outward from the receivinghole 72 in thecore member 66. A sealingmember 152 is secured to an outer peripheral surface of theexternal lead cable 130. The sealingmember 152 is fitted in the receivinghole 72 in thecore member 66. - The sealing
member 152 is made of polyimide such as PA612. The sealingmember 152 is closely adhered to the outer peripheral surface of theexternal lead cable 130 in good condition. As shown inFIGS. 11 and 12 , the sealingmember 152 is formed into a thick disk-like configuration as a whole. - The sealing
member 152 is provided on its intermediate part in the axial direction with a steppedsurface 154 that extends in the radial direction(in the direction perpendicular to the axis). The one axial side of the sealingmember 152 across the steppedsurface 154 defines asmaller diameter portion 156 while the other axial side of the sealingmember 152 across the steppedsurface 154 defines alarger diameter portion 158. A size in outer diameter of thelarger diameter portion 158 is substantially the same as a size in an inner diameter of the receivinghole 72 in thecore member 66. - The
larger diameter portion 158 is provided on its intermediate part in the axial direction with agroove 160 that is open in an outer peripheral surface of theportion 158, has a substantially constant shape in cross section, and extends through the whole periphery of theportion 158. - A
latch projection 162 is integrated with the other axial end of thelarger diameter portion 158. Thelatch projection 162 is formed into a rectangular block-like configuration as a whole. A positioning surface 163(seeFIG. 11 ) is formed on the outer peripheral surface of thelatch projection 162 by cutting out a corner of a square portion in a plan view. Thus, thelatch projection 162 has a size and a cross sectional shape corresponding to thecentral hole 94 in thebottom member 84 and extends in the axial direction. In result, as described after, when thelatch projection 162 is fitted into thecentral hole 94 in thebottom wall 84, it is possible to position the sealingmember 152 in the peripheral direction by positioning the cut-out remainder 95 on thepositioning surface 163. - The sealing
member 152 is secured to a part of theexternal lead cable 130 that extends outward from theinner casing assembly 82. The sealingmember 152 can be molded on theexternal lead cable 130 or can be secured to theexternal wire 130 by an adhesive after forming the sealingmember 152 in another process. - The sealing
member 152 secured to theexternal lead cable 130 is fitted into the receivinghole 72 in thecore member 66, when thelarger diameter portion 158 of the sealingmember 152 is inserted into thecylindrical portion 74 of thecore member 66 from the inside of thecore member 66. At this time, a sealingrubber 164 made of an O-ring or the like is disposed in thegroove 160 in the sealingmember 152. Thus, a clearance between thecylindrical portion 74 of thecore member 66 and thelarger diameter portion 158 of the sealingmember 152 is sealed by the O-ring. - An outer peripheral edge around the
latch projection 162 of the sealingmember 152 is superposed on the opening peripheral edge around the receivinghole 72 in thebottom wall 70 of thecare element 66. Thus, thelatch projection 162 of the sealingmember 152 is engaged with thebottom wall 70 of thecore member 66 from the inside of thecore member 66. - When the sealing
member 152 is fitted in the receivinghole 72 in thecore member 66, thelatch projection 162 of the sealingmember 152 is fitted in thecentral hole 94. Thus, theexternal lead cable 130 is prevented from rotating about the central axis of thecable 130. - In the
wheel speed sensor 10 described above, thelarger diameter portion 158 of the sealingmember 152 attached closely to theexternal lead cable 130 is fitted in thecylindrical portion 74 of thecore member 66 and theexternal lead cable 130 is led outward from thecore member 66 through thelarger diameter portion 152. Thus, it is possible to sufficiently attain a waterproofing function for a portion of theexternal lead cable 130 drawn out from thecore member 66. - In particular, the sealing
rubber 164 disposed in thegroove 160 in thelarger diameter portion 158 seals the clearance between thelager diameter portion 158 and thecylindrical portion 74. Thus, even if an environment in use is subject to a heavy change in temperature, it is possible to exert a positive waterproofing effect in response to an instantaneous change of a clearance between the receivinghole 72 in thecore member 66 and the sealingmember 152, thereby enabling to further enhance the waterproofing function for the portion of theexternal lead cable 130 drawn out from thecore member 66. - In addition, the revolution detecting sensor 122 and the
external lead cable 130 are contained in theinner casing assembly 82. Thus, it is possible to further enhance the waterproofing function for the revolution detecting sensor 122. - Since a connecting portion between the
lead wires external lead cable 130, and theexternal lead cable 130 are contained in theinner casing assembly 82, it is possible to draw only theexternal lead cable 130 outward from thecore member 66. Consequently, it is not necessary to protrude a great size connector joining portion from the core member, and it is possible to downsize the wholewheel speed sensor 10. - The
latch projection 162 is engaged with the opening peripheral edge around the receivinghole 72 from the inside of thecore member 66. Thus, even if an external force is applied to theexternal lead cable 130 to draw thecable 130 from thecore member 66, it is possible to prevent theexternal lead cable 130 from being drawn out. In result, it is possible to prevent an external force from being applied through theexternal lead cable 130 to the connecting portion between thelead wires external lead cable 130 or to the revolution detecting sensor 122. - Also, the
inner casing assembly 82 is clamped by thepresser hardware 144, which is pressed into and secured to thecylindrical portion 68 of thecore member 66, and by thebottom wall 70 of thecore member 66. Thus, it is possible to maintain the clearance between the holdingprojection 120 and themagnetic rotor 58 in the original size. Consequently, it is possible for the detectingsection 124 of the revolution detecting sensor 122 to attain a high precision in detection. - Although the embodiment of the present invention is described above, it should be noted that the present invention is not limited to the specific descriptions. For example, the revolution detecting sensor may be a construction in which a publicly known hole IC is molded in resin and the revolution detecting sensor is directly secured to the core member to eliminate the inner casing assembly.
-
- 10: wheel speed sensor(revolution detecting apparatus),
- 14: wheel bearing device,
- 24: inner member,
- 26: outer member,
- 58: magnetic rotor,
- 66: core member,
- 72: receiving hole,
- 80: inner space,
- 82: inner casing assembly,
- 122: revolution detecting sensor,
- 124: detecting section,
- 126: lead wire,
- 130: external lead cable,
- 144: presser hardware,
- 152: sealing member,
- 162: latch projection,
- 164: sealing rubber
Claims (4)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-201546 | 2009-09-01 | ||
JP2009201546A JP2011053053A (en) | 2009-09-01 | 2009-09-01 | Rotation detection device |
PCT/JP2010/001212 WO2011027482A1 (en) | 2009-09-01 | 2010-02-23 | Rotation detecting apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
US20120160026A1 true US20120160026A1 (en) | 2012-06-28 |
US8833166B2 US8833166B2 (en) | 2014-09-16 |
Family
ID=43649043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/393,689 Expired - Fee Related US8833166B2 (en) | 2009-09-01 | 2010-02-23 | Rotation detecting apparatus |
Country Status (5)
Country | Link |
---|---|
US (1) | US8833166B2 (en) |
JP (1) | JP2011053053A (en) |
CN (1) | CN102549388B (en) |
DE (1) | DE112010003511B4 (en) |
WO (1) | WO2011027482A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10113585B2 (en) * | 2016-11-07 | 2018-10-30 | Aktiebolaget Skf | Cabled bearing |
US10113642B2 (en) * | 2015-11-27 | 2018-10-30 | Kawasaki Jukogyo Kabushiki Kaisha | Rotation detecting device |
US11293547B2 (en) * | 2015-11-12 | 2022-04-05 | Kawasaki Motors, Ltd. | Rotation position detection device for change drum and motorcycle |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3057630B1 (en) * | 2016-10-13 | 2020-11-20 | Safran Landing Systems | PROCESS FOR CONNECTING BETWEEN THE SHAFT OF A TACHOMETER AND AN AIRCRAFT WHEEL |
KR20180108238A (en) * | 2017-03-24 | 2018-10-04 | 주식회사 일진글로벌 | Wheel speed detecting apparatus |
JP7250535B2 (en) * | 2019-01-25 | 2023-04-03 | 日本電産サンキョー株式会社 | Encoders and motors with encoders |
CN113937961A (en) * | 2021-10-22 | 2022-01-14 | 上海汽车变速器有限公司 | Temperature measurement system of motor |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5583431A (en) * | 1994-07-18 | 1996-12-10 | Nsk Ltd. | Hub unit with rotation speed sensor |
US5877625A (en) * | 1997-02-26 | 1999-03-02 | Mitsubishi Denki Kabushiki Kaisha | Magnetic sensor with supporting element for supporting output lead wire of coil |
US5880585A (en) * | 1996-02-28 | 1999-03-09 | Nippon Seiki K.K. | Apparatus including a wheel coupled ring shaped magnet, for detecting rotation of a wheel in a two-wheeled vehicle |
US6053046A (en) * | 1995-02-09 | 2000-04-25 | Denso Corporation | Rotational speed detector for vehicle wheel with sensor device and integrally formed axle cover |
US6205858B1 (en) * | 1999-11-24 | 2001-03-27 | Delphi Technologies, Inc. | Vehicle speed sensor |
US20020014888A1 (en) * | 2000-07-31 | 2002-02-07 | Yasuhiro Harada | Rotation detecting device |
US6564635B2 (en) * | 2001-09-14 | 2003-05-20 | Pete D. Sherman | Bearing assembly with integral sensor for sensing rotation |
US20060002644A1 (en) * | 2002-10-18 | 2006-01-05 | Naoki Mitsue | Bearing unit for wheel and method of manufacturing the bearing unit |
US20060254354A1 (en) * | 2005-05-13 | 2006-11-16 | Messier-Bugatti | Device for coupling and airplane wheel in rotation with a tachometer |
US7141966B2 (en) * | 2004-07-01 | 2006-11-28 | Denso Corporation | Rotation detecting apparatus |
US7401800B2 (en) * | 2005-09-14 | 2008-07-22 | Slam Corporation | Gas spring suspension system |
US20090277268A1 (en) * | 2006-11-02 | 2009-11-12 | Yasuhiko Ishii | Magnetized pulsar ring and rolling bearing apparatus with sensor having the same |
US7741838B2 (en) * | 2002-03-08 | 2010-06-22 | Ntn Corporation | Rotation detecting device and anti-skid braking system using the same |
US8253412B2 (en) * | 2005-09-30 | 2012-08-28 | Nippon Seiki Co., Ltd. | Rotation detector for a wheeled vehicle |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2551705Y2 (en) * | 1991-12-26 | 1997-10-27 | エヌティエヌ株式会社 | Rotational speed detector for wheel bearings |
JP3315443B2 (en) * | 1992-09-02 | 2002-08-19 | 住友電気工業株式会社 | Vehicle wheel speed sensor device |
FR2722343B1 (en) * | 1994-07-08 | 1996-09-06 | Skf France | CONNECTION DEVICE FOR AN INFORMATION SENSOR ASSOCIATED WITH A BEARING AND METHOD FOR MOUNTING A WHEEL HUB EQUIPPED WITH SUCH A CONNECTION DEVICE |
FR2751707B1 (en) * | 1996-07-24 | 1998-09-11 | Skf France | INFORMATION SENSOR BEARING |
DE69815739T2 (en) * | 1997-03-31 | 2004-04-22 | Nsk Ltd. | Ball bearing with speed sensor |
IT249389Y1 (en) * | 2000-05-30 | 2003-05-07 | Marchioro Spa Stampaggio Mater | JOINT STRUCTURE FOR TUBULAR ELEMENTS ARRANGED IN PERPENDICLES. |
JP4578015B2 (en) * | 2000-05-31 | 2010-11-10 | 株式会社ジェイテクト | Sealing device and bearing device |
EP1329727A1 (en) * | 2001-10-18 | 2003-07-23 | Nsk Ltd | Rotation-speed sensor device |
US6994472B2 (en) * | 2002-12-24 | 2006-02-07 | Koyo Seiko Co., Ltd. | Rolling bearing apparatus |
JP4179083B2 (en) | 2003-07-08 | 2008-11-12 | 株式会社デンソー | Rotation detector |
JP2006335318A (en) * | 2005-06-06 | 2006-12-14 | Alps Electric Co Ltd | Connection structure of rotary connector to steering angle sensor |
JP2007010480A (en) * | 2005-06-30 | 2007-01-18 | Ntn Corp | Bearing apparatus for wheel with rotation speed detection device |
JP4983108B2 (en) * | 2006-06-19 | 2012-07-25 | 日本精工株式会社 | Bearing device with sensor |
JP2008180617A (en) * | 2007-01-25 | 2008-08-07 | Ntn Corp | Bearing device for wheel with revolution detector |
JP2008241627A (en) | 2007-03-28 | 2008-10-09 | Nsk Ltd | Cover with rotation sensor, manufacturing method thereof, and bearing unit for supporting wheel |
-
2009
- 2009-09-01 JP JP2009201546A patent/JP2011053053A/en not_active Abandoned
-
2010
- 2010-02-23 CN CN201080038545.1A patent/CN102549388B/en not_active Expired - Fee Related
- 2010-02-23 US US13/393,689 patent/US8833166B2/en not_active Expired - Fee Related
- 2010-02-23 DE DE112010003511.3T patent/DE112010003511B4/en not_active Expired - Fee Related
- 2010-02-23 WO PCT/JP2010/001212 patent/WO2011027482A1/en active Application Filing
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5583431A (en) * | 1994-07-18 | 1996-12-10 | Nsk Ltd. | Hub unit with rotation speed sensor |
US6053046A (en) * | 1995-02-09 | 2000-04-25 | Denso Corporation | Rotational speed detector for vehicle wheel with sensor device and integrally formed axle cover |
US5880585A (en) * | 1996-02-28 | 1999-03-09 | Nippon Seiki K.K. | Apparatus including a wheel coupled ring shaped magnet, for detecting rotation of a wheel in a two-wheeled vehicle |
US5877625A (en) * | 1997-02-26 | 1999-03-02 | Mitsubishi Denki Kabushiki Kaisha | Magnetic sensor with supporting element for supporting output lead wire of coil |
US6205858B1 (en) * | 1999-11-24 | 2001-03-27 | Delphi Technologies, Inc. | Vehicle speed sensor |
US20020014888A1 (en) * | 2000-07-31 | 2002-02-07 | Yasuhiro Harada | Rotation detecting device |
US6564635B2 (en) * | 2001-09-14 | 2003-05-20 | Pete D. Sherman | Bearing assembly with integral sensor for sensing rotation |
US7741838B2 (en) * | 2002-03-08 | 2010-06-22 | Ntn Corporation | Rotation detecting device and anti-skid braking system using the same |
US20060002644A1 (en) * | 2002-10-18 | 2006-01-05 | Naoki Mitsue | Bearing unit for wheel and method of manufacturing the bearing unit |
US7141966B2 (en) * | 2004-07-01 | 2006-11-28 | Denso Corporation | Rotation detecting apparatus |
US20060254354A1 (en) * | 2005-05-13 | 2006-11-16 | Messier-Bugatti | Device for coupling and airplane wheel in rotation with a tachometer |
US7401800B2 (en) * | 2005-09-14 | 2008-07-22 | Slam Corporation | Gas spring suspension system |
US8253412B2 (en) * | 2005-09-30 | 2012-08-28 | Nippon Seiki Co., Ltd. | Rotation detector for a wheeled vehicle |
US20090277268A1 (en) * | 2006-11-02 | 2009-11-12 | Yasuhiko Ishii | Magnetized pulsar ring and rolling bearing apparatus with sensor having the same |
Cited By (3)
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US11293547B2 (en) * | 2015-11-12 | 2022-04-05 | Kawasaki Motors, Ltd. | Rotation position detection device for change drum and motorcycle |
US10113642B2 (en) * | 2015-11-27 | 2018-10-30 | Kawasaki Jukogyo Kabushiki Kaisha | Rotation detecting device |
US10113585B2 (en) * | 2016-11-07 | 2018-10-30 | Aktiebolaget Skf | Cabled bearing |
Also Published As
Publication number | Publication date |
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CN102549388A (en) | 2012-07-04 |
US8833166B2 (en) | 2014-09-16 |
DE112010003511T5 (en) | 2012-08-30 |
WO2011027482A1 (en) | 2011-03-10 |
CN102549388B (en) | 2015-04-15 |
JP2011053053A (en) | 2011-03-17 |
DE112010003511B4 (en) | 2014-06-05 |
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